The slippery slope argument has been employed in many areas of public policy, but is widely rejected by professional philosophers, which is a mighty good reason for thinking that the argument has merits. The idea is to take some position, and through steps accepted to the holder, show that absurd conclusions, or at least conclusions inconsistent with the position of the opponent follow. For example, the liberal philosophy of “thou shall not discriminate,” leads to ultimately accepting animal rights, and with some argument, plant rights as well, as recent evidence indicates plants may have proto-mental qualities. Likewise, arguments for abortion seem to fall into infanticide, which is exactly what we are seeing. Thus, the slippery slope argument is a valuable tool for showing the absurdity of the ideologies of the present regime.
https://www.city-journal.org/in-defense-of-slippery-slope-arguments